#include <stdio.h>

int main() {
    int L=0,M=0,N=0,G=0,A=0;
    scanf("%d", &L);
    scanf("%d", &M);
    scanf("%d", &N);
    A += N % 25;
    M += (N - N % 25) / 25;
    A += M % 4;
    L += (M - M % 4) / 4;
    A += L % 10;
    G += (L - L % 10) / 10;
    A += G;
    printf("%d\n", A);
    return 0;
}